/**
 *
 *
 hello World
78.500000
3.140000
max=400

 *
 */
#include<stdio.h>

#define PI 3.14
#define S(r) PI*(r)*(r)
#define DEBUG(s) printf("%s\n",s);
#define MAX(a,b) ((a)>(b)?(a):(b))
int main(int argc, const char *argv[]){
	DEBUG("hello World");
	float a = 2;
	float b = 3;
	printf("%f\n",S(a+b));
	printf("%f\n",S(1));

	int m = 100;
	int n = 200;
	printf("max=%d\n",MAX(m+300,n));
	return 0;
}
